Aggressive plan also calls for calls for adding 4.2 million zero-emissions vehicles

SAN FRANCISCO—California on Friday released a blueprint for meeting an aggressive climate-change goal: a 40% reduction in greenhouse gases by 2030, compared with 1990 levels.

The plan, released by the California Air Resources Board, is “designed to continue to shift the California economy away from dependence on fossil fuels to a thriving sustainable future,” according to the plan’s executive summary.